Why is my ESC beeping and refusing to arm?

Question: Why does my ESC keep beeping and not arm?

Answer: Beeping ESCs usually indicate a problem with the arming process or a safety feature triggered. First, ensure your transmitter and receiver are properly bound and powered on. Next, check that your throttle stick is at its lowest position—ESCs often won’t arm if the throttle isn’t fully down. If the beeping continues, calibrate your ESC: with the battery disconnected, hold the throttle at full, connect the battery, wait for the beep sequence, then lower the throttle to minimum. This sets throttle endpoints. Also, inspect your battery voltage; low voltage can prevent arming. Finally, verify all connections are secure and that the propellers are removed for safety during setup. If your ESC has a programming card or software, check for any active safety settings like low-voltage cut-off or motor timing that might cause the beeping. Following these steps should resolve most arming issues with beeping ESCs.